Methanol CH3OH is an alternative fuel for spark ignition engine SIE. It has characteristics high octane number compared with gasoline. If added into gasoline methanol increasing octane number in the gasoline. This study discusses the effect of using a mixture of methanol and gasoline premium as fuel to the performance of spark ignition engine SIE where the composition methanol to gasoline premium in terms of volume was 10 and 15 M10 and M15 as well as the ignition timing variation of a standard 2o advanced crank angle CA and 4o CA where the control group is a fossil fuel premium on a engine with standard conditions. SIE used for this study is a 4 stroke engine single cylinder 91 compression ratio fuel carburizing systems and variable speed test methods. Methanol-gasoline blends M10 and M15 can be directly used as fuel for the SIE without any modifications to the engine and has the advantage decreased hydrocarbons HC and carbon monoxide CO emission by 20-27 and 27 -58 respectively. However torque power and mean effective pressure BMEP was also reduced by 4 -6 and specific fuel consumption SFC increased by 7 -13. With advancing the ignition timing 2o CA torque power BMEP increased by 2-3 and specific fuel consumption reduced by 2-6 compared when standard ignition timing. Advancing the ignition timing 2o CA for M10 and M15 also produces a higher thermal efficient than gasoline by 2-4.

Keywords:

emisi gas buang; spark ignition engine; methanol; unjuk kerja mesin

Subject

: Pembakaran

Contributor

Prof. Dr. Ir. H. Djoko Sungkono K, M. Eng.Sc

Date Create

: 13/08/2013

Type

: Text

Format

: PDF

Language

: Indonesian

Identifier

: ITS-Master-21003140000773

Collection ID

: 21003140000773

Call Number

: RTM 621.43 Alb a

SourceMaster Theses Of Mechanical Engineeing RTM 621.43 Alb a, 2014

CoverageITS Community

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